Combined forced and convection flow air-heating device



1950 J. w. MILLER 2,517,909

COMBINED FORCED AND CONVECTION FLOW AIR HEATING DEVICE Filed Aug. 2,1944 2 Sheets-Sheet 1 INVENTOR. JOHN W. MILLER WIQJLM ATTORNEY 1950 1 J.w. MILLER 2,517,909

COMBINED FORCED AND CONVECTION FLOW AIR HEATING DEVICE Filed Aug. 2,1944 2 Sheets-Sheet 2 ---1 I f I Q I I N l I r o I Q l I I is: T-r--' J-L L w i Q l u. I r 5 2' 1 m N 1- "a m E INVENTOR- JOHN w. MILLER 3 BY Am a 5;; W 7%,

ATTORNEY Patented Aug. 8, 1950 COMBINED FORCED AND CONVECTION FLOWAIR-HEATING DEVICE John W. Miller, Lansing, Mich., assignor to Motor'Whcel Corporation, L

tion of Michigan ansing, Mich., a corpora- Application August 2, 1944,Serial No. 547,666

1 Claim. 7 1

This invention relates to combustion apparatus and more particularly toa novel combination of apparatus of that type with the floor andpartitions of a building to be heated.

The principal object of the invention is to provide a simple andeconomical construction and arrangement of parts for heating a pluralityof rooms with a furnace of the so-called floor type and to provide forboth a gravity and a forced circulation of air which may functionsimultanair is introduced into the spaces on opposite sides of thepartition.

., g Preferably a fan or. blower. is provided for discharging a partonly of the warm air. The blower is mountedin the upper part of thefurnace above the floor 'and' in close proximity to the dischargeopenings so as to dispense with the usual ducts or pipes.

By utilizing the blower for discharging only a part of the air,provision is made so that the apparatus can function exclusively onnatural draft. This has the advantage of making the apparatus safe incase the blower fails to operate and of permitting the use of theapparatus where electrical current is not available for operating theblower.

The present invention is capable of various embodiments, two of whichare shown in the accompanying drawings, wherein:

Figures 1, 2 and 3 are end and side elevations and a top plan view ofone embodiment;

Figure 4 is a fragmentary sectional view of the apparatus shown inFigures 1, 2 and 3;

Figure 5 is a sectional view taken on the line 5-5 of Figure 4;

Figure 6 is a sectional view taken on the line 66 of Figure 2;

Figure '7 is a sectional view of a part of the apparatus taken on theline l-l of Figure 8;

Figure 8 is a sectional View taken on the line 8-8 of Figure '7 andFigure 9 is a fragmentary top plan view of the portion of the apparatusshown in Figures '7 and 8.

Referring first to Figures 1 to 3 inclusive, there is shown a section ofa floor it supported by spaced joists H, and a vertical partition wall[2 including spaced studs I3. The floor i0 is provided with an openingbetween adjacent joists l l and the partition l 2 is provided with anopening immediately above the opening in the floor Ill. A furnace of thefloor type, designated generally by the reference numeral I5, isinstalled in the openings in the floor and partition with a portionbelow and a portion above the floor. The detailed construction of theupper part of the furnace I5 is shown in Figures 4, 5 and 6; and of thelower portion of the furnace in Figures '7, 8 and 9.

As shown in Figures 7, 8 and 9, the lower part of the furnace l5includes an outer casing It which is provided at its upper edge withlaterally extending flange ll adapted to overlie the floor I0 about theopening therein to support the furnace from the floor. Disposed withinthe casing I6 and supported from the bottom thereof by legs I8 is a heatexchanger in the form of a combustion chamber 19. A burner 20 of anysuitable type, such as oil for example, is mounted within a separatecompartment of the casing I6 and connected to the combustion chamber H?by a pipe Products of combustion are discharged from the combustionchamber l9 through a discharge pipe 22 which is adapted to be connectedto a chimney, not shown.

The interior of the casing Hi is divided into two main compartments byvertical partition 23 which separates the combustion chamber 19 from theburner 26. The burner 20 is further enclosed by a pair of verticalpartitions 24. Partitions 23 and 24 extend from near the bottom ofthecasing to near the top for a reason which will become apparent later.

A pair of vertical bafiies 25 and 26 are arranged on opposite sides ofthe combustion chamber i9, extending horizontally from wall 23 to theremote wall of the casing [6. The vertical extent of the baffles 25 and26 are from near the bottom of the casing to a zone substantially abovethe top of the casing. At their upper extremities the bafiles 25 and 25are bent first inwardly and then outwardly as indicated at A and B. Theupper extremities of the baffles 25 and 26 cooperate with the upperportion of the furnace as shown in dotted lines to form separate coldand warm air passageways 2'! and 28 to and from the heat exchanger l9.The cold air enters the casing through passageways 21 and the warm airis discharged through passageway 28. In order to prevent an exchange ofheat between cold air passageways 21 and warm air passageway 28, anadditional bafile 25A is arranged in spaced rela- 3 tion to bafile 25and an additional baffle 26A is arranged in spaced relation to baffle26.

As shown in Figures 4, and 6, the upper portion of furnace l5 comprisesa hood structure 30 adapted to be mounted upon the upper edge of casing16 and to cooperate therewith to completely enclose the heat exchanger.Hood 3!! consists of an imperforate top wall 3i, substantiallyimperforate end walls 32 and 33, and grilled side walls 34 and 35. Inorder to prevent the radiation of heat through top wall 3|, there isprovided in spaced relation below that wall a partition 36.

Within the hood 30 and extending longitudinally thereof is a baflie 31'which traps some of the warm air which passes upwardly throughpassageway 28. At each of the opposite ends of bafiie 3i! and partiallyenclosed by it is mounted a blower 38 of the axial intake radialdischarge type. Each blower 38 is formed to cooperate with a pair ofdischarge conduits 39 and 49 "at opposite sides thereof through whichheated air is discharged into the spaces on opposite sides of thepartition 52 (see Figure 3). Motors 4! and 4-2 are mounted on the endwalls 32 and 33 of hood 30 exteriorly thereof for operating the blowers38.

From the foregoing description, it will be understood that cold air 'isdrawn into the furnace from the spaces on the opposite sides ofpartition 12 through the lower portion of grills 34 and 35 by gravit andthat warm air is discharged from the furnace into the spaces onoppos'ite sides of the partition l2 through the upper part of grills 34and 35 by gravity and through the conduits 39 and 49 by the blowers 38.

The scope of the invention is indicated in the appended claim.

I claim:

A furnace comprising a heat exchanger, an open topped outer casingenclosing said heat exchanger and arranged in spaced relation thereto, apair of vertical baflies arranged on opposite sides of the heatexchanger in spaced relation with the side walls of the outer casing andin spaced relation with the side Walls of the heat exchanger saidbaffies terminating short of the bottom wall of said outer casing andextending above the top of the said casing whereby said bafilescooperate with the casing and heat exchanger to provide cold airpassageways between the side walls of the casing and the saidbaflies andwarm air passageways between the heat exchanger and the bafiles, thecold air entering said cold air passageway through the openings betweenthe upper portions of said baffles and the top of the casing and passingdownwardly to adjacent the bottom of the casing and then upwardlythrough the warm air passageway, a hood mounted on the upper edge of thecasing provided with cold air inlets whichcommunicate with the upperends of said cold air passageways, said 'hood having a pair of warm airoutlet openings positioned above the cold air inlets, the upper ends ofsaid vertical bafiies extending to points closely adjacent the innersurfaces of the side walls Of said hood thereby dividing the cold airinlets from the warm air outlets, the warm air passageways communicatingat their upper ends with that portion of the interior of the hood inwhich the above warm air outlets are formed whereby said warm airpassageways communicate with said warm air outlets, said hood havingasecond pair of warm air outlet openings located in the side walls ofsaid hood above the first mentioned pair of warm air outlet openings,and a fan mounted in said hood for withdrawing heated air from withinthe hood and for dischargingthe same'through said second pair of warmair outlets, whereby the air flows by gravity and forced draft throughsaid inlet openings, cold air passageways and then'upwardly through thewarm air passagewaysinto the hood, a baflle within the hood for dividingthe warm air into two streams whereby the one stream of arm air flowsout of the first pair of warm air outlets and the other stream of warmair is forced by said fan through the second pair of warm air outletswhereby the velocity of the discharge of air from the second pair ofwarm air outlets induces the warm air flowing through the first pair ofgravity outlet openings to be distributed with the air from the fan.

JOHN W. MILLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,536,891 Langlois May 5, 19251,660,690 Terry Feb. 28, 1928 1,984,933 Kuenhold Dec. 18, 1934 1,996,927Lake Apr. 9, 1935 2,055,926 Fraser Sept. 29, 1936 2,252,064 Cornell Aug.12, 1941 2,258,682 Kent Oct. 14, 1941 2,360,087 Tuck Oct. 10, 1944

